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A comment on Seoul's full cafes, Apple store lines show mass testing success. Parent comment

Re:Seoul's full cafes, Apple store lines show mass testing s... by pps43 on Sunday April 19, 2020 @05:50PM (#22919086)
> no one really knows

Healthcare workers wear masks. I'm pretty sure they have a pretty good idea whether masks work.

[ Parent | on HN ]
Re:Seoul's full cafes, Apple store lines show mass testing s... by lonelappde on Sunday April 19, 2020 @07:30PM (#22919696)
Tools work, of course. But they don't always work well when handled by untrained amateurs.
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Re:Seoul's full cafes, Apple store lines show mass testing s... by pps43 on Sunday April 19, 2020 @08:23PM (#22919998)
They don't have to always work well. If Alice's mask stops half the particles and Bob's mask stops half the particles, the chance of Alice infecting Bob is now 4x lower. 50% is not as good as 95%, but surely better than 0%.

All we need to do is bring the reproductive number below 1, not necessarily all the way to 0.

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